Levi Montalcini, an inventor and senator for life in Italy, celebrates her 100th birthday this week. Her big discovery? That she believes she's sharper at 100 then she was at 20. Montalcini, who won the 1986 Nobel Prize for Medicine with American Stanley Cohen for discovering mechanisms that regulate the growth of cells and organs, revealed her newest discovery at a ceremony held in her honor by the European Brain Research Institute. At the party, the Turin-born Montalcini also recounted how the 1930s anti-Jewish laws, which were established under Benito Mussolini's regime, forced her to quit school and conduct her research in a makeshift laboratory in her own bedroom.